Oscillating engine.



C. M. WALKER.

OSCILLATING ENGINE.

APPLICATION FILED ocT.13, |908.

Patented July 6, 1915.

2 SHEETS-sum1.

9 v 6, .4 E c N AT'roRNE C. NI. WALKER.

0SClLLAT| NG'-ENGINE.-

APPLICATION FILED ocT.1,3. 1908.

l9 145,449; Patented July 6, 1915.

u l 2 SSSSSS g EEEE 2.

lilrrrlasn sirens arr FFlQ@ CSSIUS IVI. WALKER, OF PUEBLO, COLORADO, ASSIGNOR TO THE WALKER-MOORE ROCK DRILL MANUFACTURING AND SUPPLY COMPANY, A CORPORATION OF COLORADO.

OSCILLATING- ENGINE.

Specication of Letters Patent.

Application filed October 13, 1905. Serial N o. 457,494.

Aof Colorado, have invented a certain new and useful Improvement in Oscillating Engincs, of which the following is a specification.

My invention relates to improvements in oscillating engines and the objects of my invention are to provide an engine that al'ternates in rotation without any exterior adjustments; to provide an engine of the character mentioned to operate under continuous fluid under pressure as distinguished from throttled feed; and other objects that will appear from the specifications. I attain these objects by the mechanisms illustrated in the accompanying drawings, in which,-

Figure l is a longitudinal perpendicular sectional view of the device/in perspective with some of the included parts in broken section; Fig. 2 is a perspective view of the abutment showing included ports in dotted lines; Fig. 3 is a part plan and part longitudinal sectional view of the abutment at line A-B of Fig. '4; F iv. 4 is a cross sectional view of Fig. 3 at line CeD; Fig. 5 is a cross sectional view of Fig. 3 at line .Fi-F; Fig. 6 isa plan view of the end of the rotating engine with partly broken sections,l

showing the relative positions of the -rotator valve piece and the piston at one limit of its motion; Fig. 7 is the same as Fig. 6 except that the piston is at the opposite limitl of its movement; Fig. 8` is a perspective view of the rotating piston with the hollow piston shaft, and longitudinal cross sectional view A or the rotator valve piece with the contained piston valve in perspective in one direction of the piston movement; and Fig. 9 is the same as Fig. Ssave and except the opposite vmotion of the piston is shown and the opposite side of the abutment in section.

Similar numerals refer to similar parts throughout the several views.

The attachment l may be of any form desired, to which the device may be fixed. ln this attachment 1 is a conduit 2 through which is conveyed fluid under pressure to the conduit 2a included in the device. The screw threaded extension 3 provides means of fixing the device to the desired attach' ment. The 'containing cylinder 7 is constructed with a breech 12. A cap 11 is screw threaded on the exterior end of the cylinder 7 and holds in position the cylinder head 8. T he ball bearing races 59 and 59a are provided to assist in reducing friction. A wing piston X, attached rigidly to the hollow pis.- ton shaft, 20, fits the interior ends of the cylinder 7 and is so disposed as to bear upon the interior sides of the cylinder 7 The hollow piston shaft 2O is provided with shoulders 4l and 43 to rest upon balls in the ball bearing races 59 and 59a, and at the same time to fit closely in the bearings in the breach 12 and head 8 of the cylinder'. The hollow piston shaft 20 is also provided with two sets of ports in the circumference thereof, a, rectangular and a right angled port in each set, one set numbered 42 and 43a, and the other set numbered 44 and 45. A working shaft 5 is provided with a slot 13 to keyseat the working shaft on the interior of the hollow piston shaft 20 and thereby connect the device with operating mechanism.

An abutment 6 is provided with a system of ports as'y follows z--Port 46 connects with port 22L and extends longitudinally into the abutment 6 having two branches, 46aL and 46", connecting with theinterior of the valve chamber 56, and another branch 46c passing around the valve chamber 56 and connecting with the interior concave face of the abutment 6; two parallel ports, 47 and 48, near to the breech connecting one Jface ot' the abutment 6 with the chamber 56; two parallel ports, 47 a and 48a, near the front end or head connecting the other face ofthe abutment 6 with the valve chamber 56; two ral Patented July 6, 1915.

diating ports 49 and 50 connecting the valve chamber 56 through the abutment 6 withA the open air; a port 52eXtending radially from the concave inner :tace of the abutment 6 near to the outer' portion ofthe abutment 6, connecting with the horizontal port 523L to the open air. The port 5l extends radially from the conca ve inner face of the abutment 6, near to the outer portion of the valve and thence horizontally to the open air. is also added at each end of the abutment the slotted ports 53 and 54 which extend from the concave face of the abutment 6 at each end up to the valve chamber 56.

A' piston valve 55 'tits in the valve chamber There 56 and is shorter than the chamber. This piston valve 'has two annular ports 57 and 58- thereon.

In the cylinder head 8 l have provided an annular channel 9 with the port 10 through the cap 11V to the open air. This is done to make connection for ports 52EL and 51 to the'open air. A throttle valve 4 is provided to regulate the amount of the fluid under pressure through the vport 2a..

The device being assembled. and the wing piston X being in position as shown in'Fig. 7, iuid under pressure is supplied, through the port 2a, controlled by throttle 4, and by that means is turned into the port 46. The piston valve 55 being in the position shown in Fig. 8, the port 46 is closed and the port 46b is opento the groovedport 58 in the piston valve 55 and the port 48 is in alinement also with said grooved port 58. Thus. the fluid under pressure lpasses through ports 46, 46,.grooved port 58, and port 48Ll and is expended against the wing X driving it in the direction indicated in Fig. 8, until said wing piston X has reached the opposite side of the abutment 6 resting thereon as shown in Fig. 6; and it will be noted that the fluid under pressure is applied directly against' the wing piston throughout the movement and .does not depend on expansion. `While this movement of the wing Cir piston X is taking place from right to left. as shown, the grooved port 57. of the piston valveA 55 is in alinement with the port 47 and also in alinement with the port `49 that extends through the abutment 6 and casing of the cylinder to the open air, thus constituting a continuous exhaust while the wing piston is moving in the direction last above stated. At the' instant that the wing piston X has completedv the movement from right to left, the port 46c, always connected with the supply of fluid under pressure, comes into alinement with the rectangular slotted port and said slotted port 45 isalso connected with the slotted port 54 in abutment 6, and thereby fluid under pressure is sup plied at the end of Valve chamber 56 adja- Mt to said port 54 and against the piston 55, driving it to the opposite position me valve chamber 56` Simultaneously with the last above stated connection of ports supplying fluid under pressure, the arm of the right angled port 44 that is parallel with the hollow piston shaft 20 .connects with the slotted port 53 in the abutment 6, and the transverse arm of said right angled port 44' also connects with the interior end of the port 51. The port 51 being open to the air and being connected by the right angled port 44 with the slotted port 53, constitutes an exhaust so that the 4fluid under pressure in the valve chamber 55 adjacent to the slotted port 53 during the last formerly described movement of the wingpiston X that has held the piston valve 55 in place, is permitted to escape, and the piston valve 55 as above stated is driven to the position shown in Fig. 9. When the piston valve is in the position shown in Fig. 9 and the wing piston X is in the posi- 'tion shown in Fig. 6, fluid under pressure last above position, the grooved port 58 thereof Iis in alinement with the port 47a,

and also in alinement with the port 50, which extendsv through the abutment 6 and the casing of the cylinder to the open air, constituting a continuous exhaust, while the wing piston X is in motion from left to right. When the wing piston X has completed its movement from left to right and just as it reaches the abutment 6 in that movement, the rectangular slotted port 42 comes into alinement with the port 46", and at the same time in alinement with the slotted port 53 in the abutment 6', thereby admitting fluid under pressure through said connected ports into the end of the chamber 56 adjacent to the port 53, thereby driving said piston valve 55 to the opposite end of the chamber 56. vSimultaneously with the last above described connection of ports supplying fluid under pressure, the arm of the right angled slotted port 43a that is parallel with the hollow piston shaft 20 is in alinement with the slotted port 54 of abutment 6, and the arm of said right angled port 43:l that is transverse to said piston shaft 20 is in alinement with the port 52 which last port is connected with the port 52a extending through the abutment 6, casing and screw cap, to the open air, thus constituting an exhaust to the open air for the duid under pressure in the end of the valve chamber 56 adjacent to the slotted port 54, so that the piston valve 55 will assume the position last above described. With this movement completed, the reverse movement occurs as herein before described. y The distinguishing feature of this mecha nism is that upon the wing piston reaching either dead center point the throw of the piston valve is accomplished instantly by the direct application of fluid under pressure, and thereby the fluid under pressure is instantly and directly applied to the wing piston in full force while the exhaust on the opposite of the wing piston is free. This device is specially applicable where com- -I do not claim the oscillating feature broadly, I claimzl. In an oscillating engine of the character described, the combination of an altery nating rotating Wing piston With a holloW 'shaft in a containing cylinder and provided with means to attach to operating shaft, and an abutment interiorly liXed Within said containing cylinder containing a system of ports connected with iuid under pressure and adapted to eXpend said Huid under pressure upon said Wing valve, also containing a system of exhaust ports, a piston valve provided with annular ports disposed Within said abutment and adapted to be operated automatically solely by fluid under pressure applied at the rear end of said piston valve from which the same is to be driven to connect operatively in alternation With said supply ports and said exhaust ports upon fluid under pressure being supplied, rectangular and right angled ports on said hollow shaft adapted to connect alternately With said piston 'valve' and adapted to Qperate the same to reverse the discharge of fluid under pressure on said Wing piston by v use of said ports in saidl abutment, the Whole adapted to be mounted upon and to operate a shaft centrally disposed in'said device, all substantially as set forth.

2. In an oscillating engine of the character described, having a cylinder and a Wing piston, an abutment attached to the interior of said cylinder containing a system of conduits adapted to be connected With a supply oi' fluid under pressure andv containing a piston chamber, a circular grooved piston valve in said piston chamber, said abutment containing a system of 4admission conduits connected operatively by -means of said grooved piston adapted to conduct the fluid under pressure alternately to either side 'ef said abutment, said abutment also containing a system of exhaust conduits connected operatively by said piston valve to exhaust alternately from either side of said Valve piece, a system of ports on said Wing piston adapted automatically solely by direct application oi fluid under pressure to the rear of said piston valve to reverse the same, substantially as set forth.

' ROBERT HENRY,

D. A. CALLAWAY. 

